1. General Model Information
Name: Spring wheat 2.0
Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: compartment model
Keywords: crop, soil, phenological development, morphological development, carbon balance, nitrogen balance, soil water balance, gross assimilation
Prof.dr.ir. H. van Keulen
Research Institute for Agrobiology and Soil Fertility (AB-DLO)
Dept. Agrosystems Research
6700 AA Wageningen
Fax : +31.8370.23110
The model describes the phenological and morphological development, the carbon and
nitrogen balance of the crop and soil and the soil water balance as dictated by environmental
conditions. Daily total gross assimilation is calculated according to Goudriaan (1986).
Author of the abstract:
CAMASE, Register of Agro-Ecosystem Models
II. Technical Information
Operating System(s): PC, VAX, Apple, Sun workstation User contract mandatory: Yes, in principle this software product may be used only fornon-commercial purposes. The product is accompanied by an AB-DLO/TPE-W AU Licenceagreement and warranty disclaimer. Costs: Dfl. 270,=.
Programming Language(s): FORTRAN-77
III. Mathematical Information
Rate variables: Growth and development of crop, transpiration, nitrogen uptake, mineralization,rate of change in amount of soil water.
Number of rate variables: 325.
State variables: Carbon and nitrogen status of crop organs and soil, water status of the soil, cropdevelopment and organ formation.
Number of state variables: 53.
Daily weather data, soil moisture characteristics, carbon and nitrogen contents of the
Daily weather data, soil moisture characteristics, carbon and nitrogen contents of thesoil, initial soil water contents. User-defined.
Number of output data: Variable.
Time interval of simulation: 1 day.
Basic spatial unit: 1 ha.
Keulen, H. van & N.G. Seligman, 1987. Simulation of water use, nitrogen nutrition and growth of aspring wheat crop. Simulation Monographs. PUDOC, Wageningen, The Netherlands. 308 pp.
V. Further information in the World-Wide-Web
VI. Additional remarks
Last review of this document by: T. Gabele: 08. 07. 1997 -
Status of the document:
last modified by
Joachim Benz Mon Dec 12 17:20:37 CET 2005